Small enough to bring just in case, but bright enough to light the way down unexpected rappels and dark trails, the Astro 300 headlamp features a compact body that is ergonomic with a low profile for better balance. In addition, the updated optical efficiency provides brighter light at 300 lumens. New for the Astro is its Dual-Fuel compatibility, allowing you to power the light with either the rechargeable BD 1500 Li-ion battery or three standard AAA batteries. The Astro’s dimming and strobe modes let you customize the lighting to your needs, and the highly weather resistant housing withstands rain and sleet from any angle.